Selective record changer



June 17, 1958 L. .J. ANDRES. 2,839,305

\ SELECTIVE RECORD CHANGER Filed May 31. 1951' 7 1Q Sheets-Sheet 1 aF/6./- I

I) H6 2 INVENTOR.

J1me 1, L. a. ANDRES 2,839,305

SELECTIVE RECORD CHANGER Filed May 317. 1951 f w 10 sheets sheet 2 .ss74 I36 205 5a l W/ l0 0' ,.1

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June 17, 1958 L; a. ANDRES SELECTIVE RECORD CHANGER Filed May 31 1951 10Sheets-Sheet 6 IM EToE. E

June 17, 1958 J, nb zs 2,839,305

SELECTIVE RECORD CHANGER Filed my 31, 1951-" 1o Sheets-Sheet 7 INVENTOR.

' mea lay 31 1951 June 11, 1958 L. J ANDRES. 2339305- smzc'rrvmscoanCHANGER 1o Sheet s-Sheet s FIG. 27.

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June 17, 1958 L. J..ANDRE$ 2,

SELECTIVE RECORD CHANGER Filed may 31. 1951 v 4 1o Sheets-Sheet 9 FIG.2/.

J n 17 1958 L. J. ANDRES 2,839,305

SELECTIVE RECORD CHANGER Filed May 31 1951 10 Sheets-Sheet 1O INVENTOR.

United assgses sELEcrrvn RECGRD cnareonn Application May 31, 1951,Serial No. 229,098

11 Claims. (Cl. 274-10) This invention relates in general to recordchangers for playing disc phonograph records and more particularly to amechanism for automatically and selectively playing side of each of aplurality of records.

lrior to this invention, selective record players of this general typewere complicated and expensive to manufactureand more specifically theyrequired the use of multiple electric motor and control switchestherefor or multiple clutches operated by complicated control mechanismsor both. These previous machines were therefore not generally used indomestic type phonographs. Thus these previous machines were confinedprincipally to professional use under the supervision of skilledmaintenance personnel.

The present invention provides a relatively simple low cost mechanismemploying a new geometric plan of elements and a new functionalprinciple of operation which provides a solution to the above set forthcomplication and limitations of use.

A principal object of the invention is the provision of a fixed magazinefor holding a plurality of records in combination with a fixedturntable, a selective record transfer head movable therebetween and atone arm for playing a record on said turntable, with said transfer headand said tone arm driven and controlled by a single cam rotated by asingle motor.

Another object of the invention is the provision of a fixed selectormeans related to a record magazine for selectively positioning a movablerecord transfer head for transferring each record in said magazine to afixed turntable with the selected side of each record uppermost on saidturntable for playing.

Another object of the invention is the provision of a fixed turntablehaving a vertical axis of rotation and a fixed arcuate shaped recordmagazine for supporting a plurality of records in vertical spacedrelation radially p vltioned with respect to said turntable axis and afixed rector means under said magazine, including a record transfer headpivotally movable about said turntable axis and positioned between saidturntable and saidmagazine including means in said head responsive tosaid selector means for registering said head in position to transfereach record in said magazine to the turntable with a selected sideuppermost for playing.

A further object of the invention embraces the conof a record transfermeans swingably mounted .g a plurality of records in a magazine andsubsequently transferring a selected record from a magazine to aturntable including a single motor driven cam fr "equentially performingboth the scanning and record i1 nsfer movement of said transfer means.

A further object of the invention of the record changer is the provisionof a fixed magazine for holding a plurality of records in verticalspaced relation positioned in spaced relation from a fixed turntablehaving a vertical axis of rotation and a record transfer means swingableabout the turntable axis positioned between the magazine es Ptent Cirand turntable and a cam for completing all cycles of operation of therecord changer for each revolution hereof including transmission meansresponsive to the movement of the cam for sequentially oscillating therecord transfer means about the turntable axis for selecting any recordin said magazine and transferring said selected record to the turntablefor playing and subsequently returning the record to its initialposition in the magazine.

A further object of the invention is the provision of a fixed selectormeans having a plurality of releasable latches, each latch correspondingto each side of a plurniity of records in a magazine and a movablerecord transfer means for selectively transferring each record in themagazine to the turntable for playing, including means in said recordtransfer means for engaging and holding each released latch to lock saidrecord transfer means in position for transferring a selected recordregardless of which direction the record transfer means is moved.

These and other advantages in one embodiment of the invention aredescribed and shown in the following specification and accompanyingdrawings, in which: i

Fig. 1 is a reduced size plan view of the selective record changer;

Fig. 2 is a side elevation of the record changer shown in Fig. 1;

Fig. 3 is a plan view of the record changer mechanism shown in Fig. lwith upper parts removed;

Fig. 4 is a side elevation of the mechanism shown in Fig. 3;

Fig. 5 is an enlarged fragmentary side elevation taken generally throughsection line 55, Fig. 3; I V

Fig. 6 is an enlarged fragmentary plan view of turntable driven elementsshown in Fig. 3;

Fig. 7 is a cross sectional view taken through section line 77, Fig. 6;i

Fig. 8 is the same as Fig. 6 with elements in a changed position;

Fig. 9 is a fragmentary side elevation of elements shown in Fig. 8;

Fig. 10 is an enlarged cross sectional view of the selector takenthrough section lines Ill-10 in Fig. 3;

Fig. 11 is an enlarged cross sectional view of the selector throughsection lines 11-11 in Fig. 3;

Fig. 12 is a top view of the master cam and selecting elements driventhereby shown in Fig. 3;

Fig. 13 is a fragmentary plan view of a friction coupling shown in Figs.5 and 12;

Fig. 14 is an en arged fragmentary plan view of the scanning elementsshown in Fig. 3;

Fig. 15 is a side elevation of elements shown in Fig. l4;

Fig. 16 is a cross sectional front view taken through section line 1616in Fig. 15, with elements in changed position;

Fi 17 is a fragmentary perspective view of scanning elements shown inFig. 14;

Fig. 18 is a view identical to that of Fig. 17, with the elements inchanged position;

Fig. 19 is a bottom plan view of the master cam and transfer elementsdriven thereby shown in Fig. 12;

Fig. 20 is a fragmentary plan view of transfer elements shown in Figs. 3and 5, and driven by elements shown in v Fig. 2 4 is'a'side elevation ofgear-elements shown in Fig; 21;

Fig. 25 is a diagrammatic elevation of elements shown in Fig. 23;

Fig. 26 is a view similar to that shown in Fig. 23 with the partsdisposed in changed positions;

Fig. 29 is a top plan View showing an alternate con 7 struction of amaster cam and transfer drive elements similar to Fig. 19 embodying thepresent invention; and

vFig. 30 is a fragmentary plan view similar to Fig. showing the,alternate construction of transfer elements.

In the interest of simplicity of the drawings, the record changerasshown holds only twelve records but it is apparent that the recordchanger can readily be constructed for a much larger number of recordswithout departing from the spirit and scope of the invention. 7

All components of the record changer are mounted on the upper surface ofa base 1 shown in Figs. 1 and 2.

A turntable2 is adapted to rotate in a position parallel V to thesurface of base 1 and rotatable about an axis 2a perpendicular to saidbase 1. An arcuate shaped magazine 3 is secured to the base with itscurvature concentrio with the vertical axis 2a of the turntable. 2. A

plurality of equi-spaced slots 4 in the upper portion of the magazineare radially disposed with respect to the turntable axis 2a and areadapted to hold in close relation 2. like plurality of disc records 5 inuniform spaced relation with respect to each other; A tone arm 6 issecured for lateral andvertical movement about and along axis 6a, withits pickup end adapted to swing over the turntable 2. A record transferhead 7 and record transport clamp 8 is adapted for reciprocatingmovement about axis 24' in a path parallelv to the base 1 indicated byarrow b--b. a

A selector assembly for controlling the movement of transfer head 7 issymmetrically positioned under the magazine 3 and is operated by manualabutments or latches 9 and 10 shown in Fig. 2. Each vertical pair oflatches corresponds to the opposite sides (A and B) of each recordpositioned thereabove in the magazine. The cover plates 11 and 12 areprovided as a housing for the mechanism thereunder and projections 13and 14 thereof provide rests for the record transport clamp 8 whena'record is in playing position on the turntable.

Figs. 3 and 4 show the recorcl changer shown in Figs. 1' and 2 with themagazine 3, cover plates 11 and 12, tone arm 6 and turntable 2 removed.The turntable motor and conventional related drive elements are retainedin'their working relationship by bridge member 15 secured by its threelegs to base 1 in the position shown. Aplate 16 resilientlysecured tobridge member 15 is the support for electric drive motor 17 and aconventional. pivotally mounted friction wheel 18, which wheel is urgedby spring means not shown into driving contact with themotor drive shaft19'and the inner periphery of the turntable rim illustrated by dottedlines 29. The turntable shaft 21 is secured at one end in the turntableand is adapted to rotate in a vertical bushing 22 secured in the bridgemember 15. The lower end of the shaft is adapted todrive the entiremechanism by means to be hereinafter described. r

'The construction of the record changer provides for four general cyclesof operation,- namely, selecting, forward transfer, playing and returntransfer. All elements rotation of the turntable.

4' r i of the above noted cycles "of operation for the selective playingof each side of each record in the magazine.

Clutch mechanism Referring to Figs. 5, 6 and 7, a radialv pawl wheel 24is secured to the lower end of turntable shaft 21 by pin 25. A drivepinion 26 having an integral offset arm 27 is positioned for rotationabout the outer surface of the lower end of bushing 22 and is retainedin its vertical position by C-washer 28. The drive pinion 26 is engagedwith teeth 29 defined on the outer periphery of the master cam 23 (seeFigs. 3 and 6), A pawl 30 pivotally secured in arm 27 by pin 31 isnormally adapted to engage by gravity any of the radial teeth 32 inwheel 24.

Thus when the turntable shaft 21 is rotated by the turntable, the wheel24 will rotate in the direction shown by arrow in Fig. .6 and pinion 26will rotate and drive master cam 23 in opposite direction as shown byarrow in Fig. 6. The purpose of the wheel 24 and the pawl 30 is toprovide a means for stopping the master cam during the playing of therecord and permitting the continued This stopping operation iscontrolled by a self-energizing sensitive clutch means of the presentinvention shown in Figs. 6, 7, 8 and 9. Figs. 6, 8 and 9 show a trigger35 pivotally secured ;to the base ona'fixed shoulder stud 36 which studis held to the base by nut-37 shown'in Fig. 9. The trigger 35 isnormally held in locked position shown in Fig. 6 during the v selectingand transferring of a record by the close prox imity of its projections38 and 39 with respect to the annular outer surface 40 of the cam 23. AnL-shaped' projection 41 of the trigger 35 has riveted thereabove arelatively light auxiliary spring 42 as shown.

involved in these cycles are driven and controlled by master plate cam23 shown'in Figs. 3, 5, l2 and 19, which can rotate about afixed stud33, secured to the base 1 by a nut 34. One revolution of the cam willcomplete all At a predetermined location in cam 23 the annular surface40 joinsa recess 43 shown in Fig. 8 and posi tioned a predetermineddistance from the rec'ess,'an abutment plate 44 is secured to the cam 23by screw 45 with its projecting end 46 extending outward from thesurface 40 and positioned to move ina path above projection 38. When-thecam 23 is rotated in the direction shown by the arrow in Fig. 8, theouter end of the plate 44 will engage trigger projection 39 and move thetrigger 35 to the position shown in Fig. 8 by'virtue of the clearanceprovided for projection 30 by recess 43. When the trigger 33 is in thisposition, the L-shaped projection 41 is in the path of rotation of thepawl 30.- As the arm 27 continues its rotation, the'lower cammingsurface 47 of the pawl'30 will engage and depress spring 42 downward andimmediately following this movement the leading edge of projection 41will engage surface 47 and cam the pawl 30 upward, disengaging it from atooth 32 thereby stopping the rotation of the pinion 26 and the cam 23.The energy stores in auxiliary spring 42 will then 'raise the pawlagainst the action of gravity a safe distance from the wheel 24. Thislatter movement is v particularly necessary to prevent momentaryres-engage ment of the pawl 30 with the teeth 32 when slight reversemovementof the pinion occurs when the pawl disengagemen't is made underload. there-engagement of the pawl 30 to drive cam '23 can t It is nowapparent that Selector assembly Referring to Figs. 3, 4 and 5, theselector assembly comprises two arcuate shaped frame members 51' and 52which are held together and secured to the baseconcent tle to axis 2aabove and parallel to the base 1 by screws 53 and 54 as shown. Aplurality, namely twelve, of lower selector latches 9 are slidablyarranged in corresponding slots in the lower frame member 51 in uniformspaced relation with each other and radially positioned with respect tothe axis 2a. Each of the latches 9 correspond to the A side of eachrecord in the magazine and is positioned directly beneath acorresponding slot 4 in the magazine 3, as shown in Fig. 1.

Referring to Fig. 5, a plurality of latch springs 55 corresponding innumber to latches 9 are secured at their inner ends to a retaining plate56 retained in the selector frame. The outer end of each spring 55 issecured to a hook 57 one provided on each latch 9 for normally urgingeach lower latch inwardly and upwardly. Each latch 9 is also providedwith a notch 58 for engagement with a latch plate 59 for normallyholding the latch in its outer position as shown in Fig. 5. It isapparent that if any particular latch 9 is tripped by slight downwardmovement of its outer end, the latch will move inward toward axis 2awith a latch abutment surface 60 resting against the inner surface ofthe frame member 51. The tripped position of a latch 9 is shown in Fig.with its inner end 61 in selecting position.

Twelve identical upper latches 10 controlled by latch springs 55identical with those already described associated with lower latches 9are arranged in inverted position directly above and in the same manneras latches 9. Each of the latches 10 corresponds to each B side of eachrecord in the magazine 3 and are released by a slight upward movement oftheir outer ends. The inner end 62 of each latch is positioned forselecting, when tripped, as shown in Fig. 10.

Referring to Figs. 3, 5 and 10, an arcuate upper slide 63 is slidablyretained in frame member 52 for rotary reciprocation concentric aboutthe vertical axis 2a. A stop screw 64 limits counterclockwise motion ofthe slide by contact with the inner end of the frame member. A coilspring 65 secured at one end to the slide and having its opposite endsecured to the frame member 52 normally urges the slide 63 into theposition shown in Fig. 3. A plurality of equi-spaced inclined camsurfaces 66, corresponding in number to latches 18, are positioned forengagement by the inner surface of projection 67 on each latch it bestshown in Figs. 3 and 5. It is apparent in Fig. 3 that when any one ofthe latches 19 is tripped and moved to its inner position, theengagement of the projection 67 with its corresponding cam surface 66will move the slide 63 to the position indicated by dotted lines in Fig.3, and conversely when the last of a plurality of tripped latches 10 isrestored the spring 65 will return slide 63 to its rest position shownin full lines.

Referring to Fig. 5, arcuate lower slide 68 is substantially the same asslide 63 and is positioned in frame member 51 inverted with respect toslide 63. The inclined cam surfaces on slide 6% are individuallyresponsive to engagement by the inner surfaces of projections 69 on thelower latches 9.

Referring to Fig. ll, a spring 70, secured at one end to slide 68 andhaving its opposite end secured to the frame member 53, normally urgesthe slide in a direction opposite the upper slide 63 and against a stopscrew, not shown. Thus the release of any latch 9 by virtue of itsabutment 69 engaging a corresponding inclined cam surface in the slide68 will move the slide about the axis 2a the same distance in theopposite direction as slide 63 is moved upon the release of any latch10.

A bracket 71, secured to both frame members 51 and 52, as shown, is asupport for a switch operating lever 72 pivoted thereto by shoulderscrew 73. The upper end of lever 72 is positioned in a slot 74 in theslide 63, better shown in Fig. 3. 72 extends through a slot 75 in thelower slide 68 with its lower end76 bearing against the operating leverof a normally open electric master switch 77, which switch The lowerportion of the lever is secured by suitable means to base 1 as shown.When all of the selector latches 9 and 10 are in their normal restoredpositions, the switch operating lever 72 is in the position shown infull lines in Fig. 11 by virtue of spring action within the switch 77.Thus it is apparent that the release of any one of the latches 9 or 10by action of the energy stored in their corresponding springs 55 willmove slide 68 or 63 respectively and simultaneously move lever 72 to theposition shown in dotted lines and overcome the resistance of the springin switch 77 to close the switch. Upon the restoration of the lasttripped selector latch, the lever 72 will assume its normal inoperativeposition shown in full lines and open the switch. There is sufficientclearance in slots 74 and 75 to permit the operation of the lever 72 bythe independent movement of each slide 63 and 68.

Record scanning and positioning of transfer head T he selective transferof any record in the magazine to the turntable for playing isaccomplished by the selective positioning of the transfer head 7 andrecord clamp 3, shown in Figs. 1 and 2. The oscillatory selectingmovement of the transfer head about axis 2a is accomplished by the uppergroove 49 in the master cam 23 through a link-work and friction drive,best shown in Figs. 1, 3, 5 and 12. A scanning plate or platform 78 forsupporting the transfer head is pivotally secured to bushing 22 by athreaded collar member 79 resting on the upper surface of pinion 26shown in Fig. 5 and is supported at its outer end by a roller 80journalled on an axle 82, with the axle fixed in radial alignment withaxis 2a to the platform 78 by shifter support 82, better shown in Fig.15, with the roller held captive in an inner race 83 concentric with theturntable axis 2a in frame member 51.

it has been found that to accomplish all conditions of selectivity, itis necessary that the record transfer clamp 8 be adapted to scan allrecords in the magazine three consecutive times; thus the platform 78must complete three excursions of lateral movement. Referring to Fig.12, groove portions 85, 86 and 87 of groove 49 are intended for theaforementioned scanning movements and the remaining portion 88 of thegroove 49 is used while the platform '78 is idle for the purpose ofreturning the scanning drive element to their normal beginning positionsduring the forward and return record transfer cycles during the singlerevolution of the cam 23 required for a complete operation of themechanism.

Referring to Figs. 5 and 12, there is provided a selector actuatinglever 89 which is journalled for rotation at one end about'a verticalstud 90 secured in base 1. A follower roller 9:. is secured for rotationon the lower side of lever 89 and is in permanent engagement with groove49. A crank plate 92, loosely journalled about collar 79, is providedwith an elongated slot 93 in which is positioned a roller 94 secured forrotation and projecting from the upper side of lever 89 as shown. .Afriction disc 95 of resilient wear resistant material ispositionedbetween the lower surface of the platform member 78 and the uppersurface of the crank plate 92 and is compressed therebetween by theadjustable tension of spring washer 96 and retaining nut 97 threaded onthe lower end of collar 79, better shown in Figs. 5 and 13.

Referring to Fig. 12, when the cam 23 is rotated one revolution, thelever 89 will transmit to plate 92 four complete to and fro movementsthrough the range indicated by dotted lines. Thus, it is apparent thatthe platform 78 and the transfer head 7 will be driven in apredetermined oscillatory path to scan all records in the magazine 3shown in Fig. 1. When the movement of the platform is selectivelystopped in register with any preselected record, to be hereinafterdescribed, the oscillatory movement of the crank plate 92 will continueby virtue of-the slippage of the friction disc 95 between crank plateinlandthe lower surface .of; the now stationary platform178.

The-construction of the meansforselectively stopping .the platform 78 inits lateral oscillatory movement for selecting a record is best shown inenlarged views in Figs.

.;14, 15, 16, 17 and 18, which figures also include the elements forconditioning the transfer head '7 to present the selected side of'eachrecord uppermost on the turntable foriplaying The shifter support 82holds in vertical alignrent a compound registration beam 99 which ispivoted for vertical movement to the head. support member 93 by atransverse pin retained in member 98 by suitable means as shown. Theframe of the beam 99 consists of vtwo spaced plates 101' and 102 eachhaving a'pair ofout- V wardly extending ears 103 and 104. Each pair ofcars "serve as supports for eachofa pair' of oppositely disposed pawls105 and 106 respectively, as shown; Each of the pawls is urgedinto theposition shown in Fight by independent coil springs 107, one of which'isshown in Fig.

' 15. The inner legs of the pawls 105 and 106'shown in dotted lines inFig. 14 serve as stops when bearing against the outer'surface of eachplate 101 and 102 respectively.

A selector latch restore bar 108 slidably positioned be-' tween plates101 and.102acompletesthe beam structure which is supported at. its vouter end in vertical slot 109 in support 8. A'curved shifter plate 110,better. shown in Fig 16, is slidablytr' etained to support 82 byshoulder screws 1111 11 and is provided with an'inclined cam surface.112for operating the hem and an appropriate clearanceiaperture 113therefor. A'notch 114' in the upper edge of the plate 'is provided toengage one end of a toggle. lever 115 tolbe hereinafter described. It isnow apparent that when the shifter plate 110 is moved from the positionshown in full lines to the position shown in dotted lines, the camsurface 112 will raise the beam 99 about pin 100 in slot 109 to itsupper position shown I in Fig. 15; When the beam 199 is' in its lowerposition, shown in Fig. 16, the pawls'105 and 106 will travel in a Ilateral path to engage and temporarily'retain therebetween any one ofthe tripped lower selector latches 9.

and when the beam is in itsupper position, the pawls are positioned toengage and. temporarily retain therebetween any one of the tripped upperselector latches 10. The toggle lever 115 is secured to the upper endofan axle 1116 journalled for rotation about a vertical axis in bracket117 secured to platform '78 as shown. Thefouter end of lever 115 is inworking engagement.withnotch 114 in plate 110 and its inner end is inengagement with a similar first shift the plate 110 to its oppositeposition and then .notch in a secondary shifter 'pIateHS'to'behereinafter I described. A'conventionaltcom ression ty etoggle springassehibly119 is pivoted. to stud 120 in the lever 115 and stud 121' inbracket :117, thusiproviding a detent means for brgin iandholdingithe'lever .115 and thef plates 110 and 1'18 infeach of their twopositions asshown in full and. dotted lines iniFig. 14.

' Referringt'o Fig.5, theiselector restore bar'108 is adapted forlongitudinal and vertical movement on a .coaxial roller 123 supported bypin 100 and shoulder stud 122 which studis supported by plates 101 and102 shown a in Fig. 15. A spring'124 secured atone end to pin 125 insupport 98 and secured at its opposite end to projection 126 normallyurges the bar 108into a position as shown in Figs. 5 and 14, with itsjaw end 127 withdrawn inwardly from theouter ends of the pawls 105 and106;

Because of the inclined position of the spring 124, the bar issimultaneously urged upward for a trigger action to be hereinafterdescribed. A slidable rack member 128', shown in Fig. 5, for driving:the transfer head and operating therestore bar 108 is'positioned in arectangular channel-1 29 in head support 98; which" channelv ispositioned 'in' longitudinal radial alignment with turntable axis 2a andthe restore bar 108, shown in Figs. 3. and 5. Rack teeth 130. in theupper surface of the slide are normally engaged with a pinionlfil fordriving the transfer head 7. A retainer plate 132 seclockwise movementof the platform 78 about axis' la as viewed in Fig. 3. is limited by thecontact of the end 137 of shifter plate 110 abutting against stopbracket 135, to

to arrest the motion of platform 78 and the transfer head carriedthereon. Whenthe platform 78 is driv'en'to its u extreme oppositeposition about axis 2a, the end 138 of' the shifterplate 110 will abutagainst stop bracket 136 and first movethe plate '110 to its oppositeposition and then arrest the platform 78 and the transfer head carriedthereon.

Perspective Figs. 17 and 18 showthe two positions assumed by the beam 99for selectivelyplaying each side of a record. Fig. 17 shows the beam 99resting on the V lowermost portion of camming surface 112 with the pawlsand 106 carried thereby engaging therebetw een the inner end 61 of atripped latch 9. This engagement will arrest the lateral movement of theplatform 78 and register the transfer head with a record in the magazinecorresponding to the engaged latch 9. This lower position of the beam 99corresponds to the dotted line-position of the toggle lever 115' shownin Fig. 14 for conditioning the transfer head to transfer a record withtheB side of p a a record uppermost on the turntable for playing.

Fig. 18 illustrates the same elements shown in Fiig. 17'

with the shifter plate 110 moved to its opposite position which movementhas positioned beam 9 9 on the, upperm ostportion of the cam surface 112with its pawls 1115 and 106 in'engagementwith the inner end 62 ofonetripped latch 10, which corresponds to the full line. position of thetoggle lever 115 shown in Fig. 14 forconditioning the transfer head 7 toplace the A side of a record uppermost on the turntable for playing. Themovement of the beam 99 into either its upper or lower position willresult in the temporary locking engagement of any. tripped latch withthe pawls 1G5 and 106 by virtue of .the inward camming movement ofeither pawl against the restrain ing action of their independent springs107 shown in Fig.

15. Thus oscillatory movement of the platform 78 in either directionwith the beam 99 in either itsupper or} lower position will engageanytripped latchin'the path of movement of thepawls'105 and 106...

Referring to Figs. Sand 17, the restoration of each V tripped latchoccurs during thefinal movement of thereturn transfer cycle. During'theforward transfer'cycle, the rack member 128 will-have moved towardtheaxis'fZa and thus the inner end of the restore bar 108 will assume 7 itsupper position with latch end-134 in the path of movement of the restoreend 1330f rack member '12 8-by virtueot the vertical force component ofspring 124.; There turn movement'of'rack'member 128 will. engage its endI I 133 withthe bar end 134 andmove the bar and itsjaw 127 to a positionshown by dotted lines in Fig: '14,: thereby engaging and restoring thetripped latch previously; held betweenthe pawls 105 and 106to itsnormal're-latch position. Following the restoration of each latch'thecam surface 139 of restore bar 1&8 shownin Fig.5 will have moved the barsufiiciently downward against the restraining action of the spring 124to releaseengagement of latch end 134 fromend 133 of rack member 128,thns returning the'bar to the position shown in Fig. 5 ,with

end 134 under end 133 permitting the same-restored'sele'ctor latch to bere-tripped without interference from the jaw 127. 1

Movenz'entlprodwcing means jfor recordtrd'risfer The record transfercycle which includes the clamping of a selected record and transferringthe, same to the turntable with the selected side uppermost and thenunclamping the record for playing and the reverse operation thereof, torestore the record to its original place in the magazine, isaccomplished by the transfer head 7 and its associated record clamp 8shown in Figs. 1 and 2. The drive for operating the head 7 originates ingroove 48 in the lower face of the master cam 23 shown in Fig. 19. Theportion of the groove 48 subtended by the angle 140 has a constantradius in order that the transfer elements remain in inoperativeposition during the previously described selecting cycle. The radialangle 141) is identical to the sum of the radial angles subtended byportions 85, 86 and 87 of the groove 49 in the upper face of the cam 23.The portion of the groove 48 subtended by the angle 141 is utilized fordriving the transfer head through its complete forward transfer cycleand the portion of the groove 48 subtended by the angle 142 is utilizedto drive the transfer head through the return transfer cycle. Theportions of groove 48 subtended by angles 141), 141 and 142 are alsodesignated by reference numerals 140, 141 and 142, respectively. Whenthe cam 23 is stopped for the playing cycle, the roller 147 ispositioned at the outer apex junction of groove portions 141 and 142. Itis also to be noted that during the complete forward and return transfercycle and resulting movement of arm 145, Fig. 19, that lever 89, Fig.12, is moving through portion 88 of groove 49 in order to begin itsentry in portion 85 for a subsequent selecting cycle.

Referring to Figs. 3, 4 and 19, a hub 143 is adapted to rotate about avertical stud 144 fixed at its lower end in the base 1. A transfer crankarm 145 is secured to a lower flange 146 of the hub 143 and carries atits outer end a follower roller 147 projecting into engagement withgroove 48. An upper crank arm 148 is secured to an upper flange 149 ofhub 143 and terminates at its outer end in a quadrant gear 150. Thequadrant gear is permanently engaged with gear 151 which is an integralpart of a secondary transfer cam 152 journalled about bushing 22, bettershown in Figs. and 20. Again referring to Fig. 19, for each revolutionof the master cam 23, the arms 145 and 148 will move to the positionshown in dotted lines and return to the position shown in full lines,thus completing a complete transfer movement. This movement will impartone clockwise and one counterclockwise cycle of rotation to cam 152 byvirtue of the quadrant gear 150 meshing with the secondary cam gear 151.

Referring to Figs. 5 and 20, cam 152 has therein a groove 153 which isgenerally spiral in shape and modified to equalize variable torquerequirements of the transfer head 7. Roller 154 positioned forengagement in groove 153 is secured for rotation by vertical stud 155anchored in rack member 128 slidably retained in channel 129. When cam152 is rotated to position shownin dotted lines about bushing 22 by theaction of gear 151, the roller 154 in engagement with the cam willwithdraw rack member 128 a predetermined distance 156 shown by arrow inFig. 20. The rack member 128 will complete one reciprocal movement tooperate the transfer head one complete forward and return transfercycle. It is to be noted that the platform 78 carrying the support 98has a range of selecting movement indicated by arrow 157. Thus the cam152 must be rotated for each transfer an angle equal to the sum of theangle required for the radial movement of bar 128 and the selectingangle 157 in order to accommodate the various positions assumed by theplatform 78 when arrested in register with any record in the magazine.

Record transfer head and clamp Referring to Fig. 21, the transfer head 7consists of vertical frame members 160 and 161 secured to support 98 bysuitable screws as shown. A trunnion member 162 is journalled forrotation about horizontal axis 162a in vertical members and 161. Oneprojecting hub of trunnion 162 is secured to a mutilated gear 163,better shown in Fig. 24, which gear is adapted to be intermittentlydriven by a mating mutilated gear 164. The latter gear is secured to theouter end of jack shaft which shaft is journalled for rotation invertical members 160 and 161 and adapted to be driven by pinion 131which is positioned midway between the frame members 160 and 161 asshown in Figs. 5 and 21.

During a complete cyclic movement of shaft 165 and gear 164, the gear163 will be driven intermittently through a predetermined angle ofrotation, to rotate the trunnion 162 to transfer a record from themagazine to the turntable and upon the reverse cyclic rotation of shaft165 and gear 164, the intermittent movement imparted to trunnion 162will retum-transfer a record from the turntable to its initial positionin the magazine.

Referring to Figs. 21, 22, 23 and 24, gear 166, having a pitch diameterthe same as gear 163, is provided with a hub 167 adapted for rotation ina bore in trunnion 162 concentric with the axis 162a. The inner end ofthe hub 167 terminates in an elongated toggle 168 positioned adjacentthe shaft 169 shown in Fig. 23. Gear 170 positioned on shaft 165 issecured to and driven by gear 164 and has the same pitch diameter asgear 164. Thus rotation of the shaft 165 will rotate gear 170 and impartopposite rotation to gear 166 for the purpose of rotating toggle 168through a 90 angle of movement with respect to trunnion 162 for clampingand unclamping a record within the clamp 8.

Referring to Fig. 4, the record clamp 8 is provided with pivoted outerjaw 171 having V-shaped gripping surfaces on its inner periphery. Thejaw is loosely retained to the outer end of clamp 8 by pivot 172. Theinner jaw 179 is slidably secured in hub member 175, better shown inFigs. 21 and 23. The cylindrical portion 174 of the hub is positionedfor reciprocation and rotation in a bore 175 in the trunnion 162 atright angles to the axis 162a. A record turning cam 176 has acylindrical hub 177 also adapted for rotation and reciprocation in thebore 175, as shown in Fig. 23. One end of shaft 169 is secured in acoaxial bore in cam 176 by pin 178. The opposite end of shaft 169terminates in inner jaw 179 for gripping the edge of a record oppositethat from the outer jaw 171. A hexagonal bushing 18%) is securedconcentrically to shaft 169 by pin 169a and is adapted for reciprocationin a hexagonal pocket 181 in hub member 173. A coil spring 182 aroundshaft 169 in a clearance pocket in the hub member 173 normally urges thehub member 173 and the hexagonal bushing carrying shaft 169 with hub 177in opposite directions. When the toggle member 168 is moved to theposition shown in dotted lines, hubs 173 and 177 will move equaldistances toward each other thus moving the inner jaw 179 and the clamp8 with its outer jaw 171 equi-distantly toward each other for clamping adisc record therebetween under the force supplied by spring 182. Thus itis apparent from Figs. 1 and 2 that when the clamp 8 is positioned overa selected record, the first movement of shaft 165 will result in therecord being firmly clamped between the inner jaw 179 and the outer jaw171 of clamp 8.

Referring to Fig. 21, the secondary shifter plate is journalled forlateral reciprocation in a pair of slots in frame members 160 and 161and has a spherical stud 183 secured in an integral offset ear thereof,better shown in Fig. 23. The position of the plate 118 is controlled bythe movement of lever 115 shown in Fig. 14 engaging notch 184 in thelower edge of the plate. When lever 115, shown in Fig. 14, is shifted toeither of its two positions, the plate 118 will alternately occupy theposi- 75 tion shown in full lines and the position shown in dottedportion of spindle in the outer end'of crankZfitlis normally positionedlines, Fig. 22 movement positions thefstud 183 toeither of twopositionscorresponding to the playing:

of opposite sides of each. record. Stops 185 and. 186 integral withplate 118 bear against the frame members 160 and 161 respectively toaccurately position the stud 183 with respect to cam 176.

Referring to Fig.25, the cam 176 has cut in its outer. spherical facetwo Y'-shaped grooves 187 and 188 dis-' posed equi-distant from theturning axis 176a. The trunnion 162, as shown in Fig. 23, is in itsnormal rest posi i r2 groove of a. record to be played.v The latter partof thisinward. swinging movement .is accompanied ,by -the lowering ofthe vertical .spindle 197 by the action of the v leading surface of theinclined cam 204 to lower. the

tion. After the clamping of the record by the ninety 7 degree rotation.of toggle 168,'the trunnion 162'is ro-,

tated about axis 162a to withdraw airecord fromthe magazine. shown inFig, 26, th e stud 183 will enter groove 133 in the cam and begin therotation of the cam and'the hub member '173jto' rotate the clamp 8 andthe record ninety degrees from .its vertical position. Continued At apredetermined. angle of'rotation, as

rotation of the trunnion in .the'same direction will place the record inhorizontal position ontheturntable for playing with its B side uppermostfor playing. It is now apparent that when the trunnion 162is rotated inopposite direction to return the record to the magazine, the stud 183.will re-engage the same groove 188 and rotate the hub 173 ninetydegrees in reverse direction in order to return the record to itsoriginal verticaliposition. in the magazine. When the plate 118 is movedto the position shown in dotted lines, Fig. 22, and the,trunnion 162' isrotated, the stud 183 will engage groove 137 in the cam and rotate thecam and hub 173 ninety degrees in opposite direction to position the Aside of the record uppermost on the turntable; The dual rotation of thecam 176 for rotating about axis 176a is illustrated ,in

Fig. showing both'ultimate playing positions of the clamp 8 indotted'lines.

Q Referring to Figs. 21, 22 and 26,;four upper guide blocks 189, 190,191 and 192 integral with frame members 160 and 161 are shown forabutting and guiding the outer rectangular surfaces of hub 173 and cam176 during 7 their simultaneous rotation aboutaxes 162a and 176a,

Rest position stops 193 and 194 also integral with frame members 160 and161 respectively serve as a rest for the hub "173 when the :trunnion162'is in its rest posi-' tion with the clamp 8 over the magazine. Aspacer 195 shown in section, Figs; 23 and 26 and better shownin Fig. 3,is secured to frame members 160 and 161 as a stop for the hub 173 whenthe trunnion 162 is' in playing position. a

7 Tone .qrm support and control means therefor Referring to Figs. 3, 4and 27, a tone arm support 196 issecured to .the base 1 by screws, asshown. A vertical spindle 197 is journalled for rotation andreciprocation in bearings198 and 199 integral withthe support 196. Atone arm crank 200 is fixed to the lower as shown.

the turntable. The upper tone arm mount 205, shown in. Figs. 3 and 4, ispart of the construction for pivoting the, tone' arm for verticalmovement. and for holding the same in rest positionqthe constructionof-which is fully described in'applicants copending U. 'S. patentapplication,.Serial No. 180,291. 7

Referring to Fig. 12, the inclined portion 206' of 'the,

groove is used to move the follower pin 201, shown in Fig. 27, and thetone arm inward over the starting A follower pin 2%? An inclineddepressed cam' needle into' playing contact with the'starting groove.

At this point, the follower pin201is in the clearance" pocket 207, asshown in full lines, at which position: the movement'of the cam 23 isarrested'and the needle and tone arm are free to follow the recordgroove to its cutoff postion indicated by the dotted positionofpin 201,at which time the'outer end 203 of thejcutoif lever 202 Will'contact andmove trigger 35, shown in 'Figf27' The first movement 7 to begin thereverse transfer cycle. of the cam23 following the playing of the recordwill by action of the trailing incline of cam 204'raise spindle 197 todisengage the needle from the record. Concur-.v

rent with this movement, the inclined surface 208joff pocket 207 willcam pin 201 outwardly and rotatethe spindle 197 to return the tone armto its normal rest position. V t A simple electric circuit, not shown,connecting the master switch 77, shown in Fig. 10, in series withjmotor"17, shown in Fig. 3, to a source of electric. power will stop and startthe motor 17 dependent uponthe switch 77.1

Operation Thecomplete operation of the mechanism willbedescribed byfirst assuming his in rest position, as shown:

in Figsil and 2, with-thetransfer head in its mid-posh tion, allselectorlatches restored, and the registration 7 beam 99 in its lowerposition, as shown in Fig. 17. This lower position of the beam 99resulted from the previous;

playing of the side A=of a record. Furtherassuming that the B side ofthe record designated as A-B inlFig; 1 is selected for play," then theupper latch-10 under" the record is tripped and referring to Fig.3, theinward.

movement of the latch will cam the upper slide-63 :to' i the positionshown in dotted lines, and move .lever 7 -2,

shown in Fig. 11, to the position shown in dotted lines and operateswitch 77 to complete acircuit, not shown,

to motor 17. The rotation of the motor'shaft' 19 will drive theturntable, shown in Fig. l, ina clockwise direction by the action of thefriction drive wheel 18, shown in Fig. 3, thus imparting clockwiserotationto shaft-21.

Shaft 21 will drive master cam 23 counterclockwise through. the clutchand pinion 26, shown in Fig.-;6.

Referring to Fig. 12; the actuating lever 89 will'ifirstg be moved tothe position shown. in-dottedilinesby 1301'! I tion of groove 49, whichmovement will drive the;

platform 78, shown in Fig. 3, and the transfer head thereon to itsextreme counterclockwise: position by Near means of thefrictioncoupling, shown in Fig. 13. the end of this movement .of the platform 78and, refer: ring to Figs. 17 and 3, the working end 137 of shifter platewill be arrested by bracket 135. The complee 7 tion of thecounterclockwise.movement of the platform. will move shifterplatelltlwith respect to the platform,

and raise beam99 to itsupper position, shown in Fig. 18, with its pawls105and 106 now in position to scan the; inner ends of latches 10. Thisshifter movement will overcome the restraining action of the togglespring assembly 119 and movetoggle lever andrsecondary shifter plate 118to the. position shownby dotted lines in Fig. 14, for the' purpose ofpositioning thespherical stud 183 tothefposition shown in dotted linesin Fig 22. Qentinned'rot'ation of the cam 23 will new drive the platformand transfer head in a clockwise direction by the'action of theportion,86 of'the groove 49. 'As

the platform,78 approaches registration with the tripped latch 10, pawl106 will cam inward and over the end of the latch 10 and the pawl 105will serve as a stop against the latch to stop and lock the platform inproper registration as shown in Fig. 18.

Referring to Fig. 12, thecontinued movement ofcam,

23 will continue the movement of lever 89 and crank 13 plate 92 untilthe roller 91in the lever 89 has reached the end of the groove portion86 and through groove portion 87 to complete the selecting cycle 'of themechanism. This movement will again place the lever 89 and the plate 92in position shown in dotted lines having completed three oscillatorymovements, with the portion of this movement following the latching-ofplatform 78 overcoming the friction of the coupling shown in Fig. 13. Itis thus apparent that any tripped latch will intercept and stop themovement of platform 78 with the record clamp 8 in register over therecord corresponding to the tripped latch.

During the above described portion of rotation of cam 23 and referringto Fig. 19, the roller 147 in the transfer crank arm 145 was followingthe radial portion 140 of the groove 48, thus holding the lever 145 andrelated transfer elements in fixed position. The forward transfer cyclebegins with the entry of roller 147 into the portion 141 of the groove48 which will rotate arms 145 and 148 about stud 144 to rotate gear 151and secondary transfer cam 152, shown in Fig. 20. The clockwise movementof cam 152 will engage roller 154 at a time dependent upon the positionof the platform 78. Continued movement of the cam 152 will begin thewithdrawal movement of rack member 128. Then referring to Fig. 23, thepinion 131 will rotate jack shaft 165 in a counterclockwise directionand by the action of gears 166 and 170, shown in Fig. 21 and previouslydescribed, will rotate the elongated toggle 168 from a position shown infull lines to the position shown in dotted lines to permit equal andopposite longitudinal movement of hubs 177 and 174 under the restrainingaction of spring 182 to clamp the selected record in the magazinebetween the jaws 179 and 171 better shown in Fig. 4.

Because of the timed relation of gears 163, 164, 166 and 170 and at thecompletion of the clamping movement of the toggle 168, the leading toothin gear 164 will engage a corresponding tooth in gear 163 and begin therotation of trunnion 162 about axis 162a to withdraw the selected recordfrom the magazine. The dotted or clamped position of the toggle 168 willremain the same with respect to the trunnion by virtue of the equalpitch diameters of the clamping and transfer gears.

When the trunnion has reached the position shown in Fig. 26, the recordwill have been completely withdrawn from the magazine and in position tobe rotated about axis 176a in a direction for playing the A side of therecord, which rotation is accomplished by the entry of spherical stud183 into Y-groove 187 in cam 176 as illustrated in Fig. 25. Continuedrotation of the trunnion about axis 162a will rotate the cam 176 andclamp 8 about axis 176a and place the record on the turntable with the Aside uppermost for playing. In this case for playing the A side, therecord clamp 8 will be in position shown in dotted lines adjacent to theuppermost edge of the turntable shown in Fig. 1. At this point of therotation of the trunnion, the teeth of the gear 164 will disengage fromthe teeth in the gear 163 to stop the rotation of the trtmnion. Thecontinued withdrawal of slide member 123 and the continued rotation ofjack shaft 165 and gears 166 and 170 will rotate the toggle 168 withrespect to the trunnion and cam apart the hubs 177 and 174 to releasethe selected record from the record clamp 8 on the turntable forrotation thereby, which completes the forward transfer.

Referring to Figs. 12 and 27 and simultaneous with the above mentionedunclamping of the record on the turntable, the follower pin 201 forcontrolling the lateral position of the tone arm, shown in Fig. 27,which during all previous operations has been engaged in the concentricportion of the groove 50, shown in Fig. 12, will be moved inward by theinclined portion of the groove 206 to swing the tone arm over the recordwith the needle in position to engage the starting groove thereof.During the latter portion of this swinging motion the lower end of thetone arm spindle 197, Fig. 27, will be lowered by the leading surface ofthe cam 204, to the position shown in dotted lines in Fig. 27, whichmovement will lower the tone arm and engage its needle in the startinggroove-of the record. immediately following the lowering of the tonearm, the rotation of the cam 23 is stopped by the action of the clutchpreviously described and shown in Figs. 6, 7, 8 and 9. The tone arm andthe needle therein will then follow the spiral groove in the rotatingrecord with the follower pin 201 moving from the position shown in crosssection, Fig. 12, to the position shown in dotted lines, at which timethe outer end 203 of the cutoff lever 202, shown in Fig. 27, will engageand move the trigger 35 to swing its L-end 41 outward, as shown in Fig.6, and permit the clutch pawl 30 to gravitate into re-engagement withthe rotating pawl wheel 24 to again start the rotation of the cam 23which movement completes the playing cycle of the mechanism, and marksthe beginning of the reverse transfer cycle.

The return transfer movement is accomplished by the action of theportion 142 of the groove 48, shown in Fig. 19, wherein the roller 147will be moved from the outermost apex of the groove 48 to its innermostconcentric portion shown in dotted and full lines, as shown in dottedand full lines in Fig. 19. All operations described during the forwardtransfer are repeated in reverse order during the reverse transfermovement, including the deposit of the record in the same position inthe magazine as previously occupied and followed by the unclamping ofthe record from the record clamp 8. During the first portion of theunclamping movement of the rack member 128, shown in Fig. 3, its outerend 133 is engaged with the latch end 134 of the bar 108 causing the bar1118 and its jaw end 127 to move therewith toward the tripped latch 10and against the restraining action of its spring 124, shown in Fig. 5.When the latch 10 is engaged by jaw 127 and moved into its restoredposition, then the cam surface 139 will move the bar 108 downward anddisengage its latch end 134 from the restored end 133 of slide 128, thuspermitting the spring 124 to retrieve the bar 108 to restored position,shown in Fig. 5. The selector latch 10 will remain in restored positionby virtue of notch 58 of the latch engaging latch plate 59, shown inFig. 5.

Since it was assumed that only one latch 10 was tripped, the upper slide63 will return to the position shown in full lines in Fig. 3 by theaction of spring 65. This movement will permit the lever 72 shown inFig. 11 to move to the position shown in full lines and open the switch77 and stop the driving motor 17, thus arresting the motion of the cam23 and completing the return transfer cycle of the mechanism.

In order to play the A side of a selected record, any selector latch 9may be tripped and action of slide 68, shown in Fig. 11, will move lever72 to the same position as previously moved by slide 63 to close theswitch 77 and again begin the rotation of cam 23. Since the plate wasleft in the position, shown in Fig. 18, with the beam 99 in its upperposition, the first motion of the platform will be counterclockwise tothe end of its stroke,

which motion will not affect the position of the plate, then theplatform will next be moved clockwise by the cam to its other extremeposition, the latter portion of which movement will cause the workingend 138 of plate 110 to be moved by bracket 136 shown in Fig. 3, to theposition shown in Fig. 17, with the beam 99 in its lower position. Thusthe next counterclockwise motion of the platform 78 will result in theengagement of pawls 185 and 106 with the tripped latch 9, with therecord clamp 8 in register with the selected record. When the plate 110was moved to the position for playing the B side of the record thesecondary shifter plate 118 was simultaneously moved to the positionshown in full lines in Fig. 14.

The transfer cycle for playing the A side of the record dis 7 isidentical to that previously described for playing the B 7 side of arecord except that the spherical stud 183, shown in Fig. 22, ispositioned as shown in full lines in order to engage the Y-groove 188 inthe turning earn 176, shown in Fig. 25, in order to turn the recordclamp and record contained therein in opposite direction about the axis116a to place the A side of the record uppermost of the turntable asindicated by the dotted position of the clamp 8 around the lower edge ofthe turntable shown in Fig. 1.

Referring to Figs. and 17, it is now also clear that the restoringaction ofbar 188 responsive to the movement of rack member 128 will movethe tripped latch 9 to its restored position during the unclamping ofthe corresponding record in the magazine followed by the release of therestore bar 108 to its normal inoperative position shown in Fig. 5.'VVhen a'plurality of selected latches 9 and 1G or both are tripped,'themechanism will sequentially play all selections and upon the completionof the play- :ing the last record and the restoration of the latchcorrethese records in proper sequence.

Modification Illustrating another embodiment of a transmissionresponsive to the rotation of cam 23, Figs. 28, 29 and 30 show the useof quadrant gear drives for both the selecting and transfer cycles. Thecam 23a, substantially the same as cam 23 previously described, hastransfer groove 48 in its upper surface thereof and the selecting groove49 in its lower surface. i

Fig. 28 illustrates a lever and gear drive for accomplishing theoscillating movement of platform 78 by eliminating the lever'89 and thecrank 92 shown in Fig. 12. Crank arm 209 carries at its outer end aroller 210 in permanent engagement with groove 49 in the cam 23a. Asegment gear 211 is secured to arm 209 by means of hub219 with its teethin timed engagement with pinion 212, which pinion is integral withfriction disc 213, the latter replacing the plate 92, shown in Fig. 13.Thus it is apparent that when the cam 23a is rotated, the arms 2G9 and211 will pivot about stud 144 and drive pinion 212. The platform 78 willbe oscillated in the same manner as when driven by the lever 89, shownin Fig. 12.

Figs. 29 and 30 illustrate a direct connected link work for driving thetransfer head 7 utilizing a crank and a connecting rod instead of thesecondary transfer cam shown in Fig. 20.

Referring to Fig. 29, the pinion gear 151 has integral therewith a crankarm 214. A connecting rod 215 is pivotally connected to the crank arm bypin 216. The crank arm 145 and the crank arm 148 are substantially thesame as shown in Fig. 9, but with a modified relation to each other intheir mounting to an independent hub 218 journalled on stud 144. Thequadrant gear and pinion 151 are proportioned to rotate'the crank 214one hundredeighty degrees and return for each revolution of cam 23a.

Referring to Fig. 30, the connectingrod 215 is pivotally connected torack member 128 by pin 217. Thus the one hundred-eighty degreecounterclockwise rotation of gear 151 will, by virtue of the crank 214and the connecting rod 215, withdraw bar 128 and complete the for- 16 rparted to the rack member 128. Because of the angular displacement ofthe rack member from the fixed central position of the crank 214, thisunnecessary movement will not aifect the normal operation of themechanism because the elongated toggle 168 shown in Fig. 23 will noteifect.

the clamping of a record until it has moved at least thirty degrees.Furthermore, the slight indefinite outer position of rack member 128will not elfectthe restoration action of the selector restore bar 108for the reason that its end 134 will have tripped from the end 133 ofthe rack member considerably before the rack member has reached the endof its stroke. rack member 128 with respect to movement of the platform78 into any one of its positions because of the useof the connecting rod215 instead of the cam 152 is not important. V

It will be apparent to those skilled in the art that the presentinvention is not limited to. the particular constructions shown ormethod of employing the same, and that changes and modifications may bemade without departing from the spirit and scope of the presentinvention. It is aimed in the appended claims to 'cover all such changesand modifications.

What is claimed as new and desired to be secured by Letters Patent ofthe United, States is: p

'1. In a record changer of the character described means forminga base,a turntable secured to said base for rotation about an axis verticalthereto, a record magazine secured to said base in spaced relation withsaid turntable for retaining therein a plurality of disc records invertical equi-angular spaced relation, each of said records beingsupported in equi-distant radial position with respect to said axis, afixed selector secured to said base including a plurality of movableabutments retained in said equiangular spaced relation and normallypositioned equi-distant from said axis, each of said abutmentscorresponding to a diiferent one of said records and supported forpredetermined displacement toward said axis for selecting the respectiveones of said records, a record transfer means pivotally secured to saidbase and mounted for lateral oscillatory movement about said axis forscanning said records in said magazine when oscillated, drive means foroscillating saidtransfer means, a pair of'pawls pivotally mounted onsaid transfer bar for movement past the ones of saidabutments'corresponding to nonselected records and for engagement withthe ones of said abutments which are displaced toward said axis andcorrespond to selected records, said pawls being normally spaced apartby a distance substantially equal to the thickness of each of saidabutments, spring means for biasing said pawls in opposite directionstoward said normal positions so that the selected ones of said abutmentsare adapted to beengaged and held by said pawls irrespective of thedirection of movement of said transfer means relative to said abutmentsthereby to arrest and hold said transfer means in register with aselected record in said magazine corresponding to a selected displacedabutment. r

2. In a record changer of the character described means forming a base,a record transfer means including a record transport head pivotallysecured tosaid base for oscillatory movement in a predetermined angleabout an axis vertical thereto, an arcuate selector secured to said basein uniform proximity to the path of'movement of the outer end of saidrecord transfer means, a plurality of movable lower abutments retainedin said selector in radial equi-angular spaced relationwith respecttosaid axis and normally positioned equi-distant from said axis, each ofsaid abutments adapted for predetermined displacement toward said axis,a plurality of like upper movable abutments retained in said selectorvin like positions in predetermined spaced relation to said lowerabutments, a registration member having pawl means retained on its outerend secured for'vertical movement to a the outer end of said transfermeans and positioned to scan said lower abutments when in its lowerposition and Thus the error in the positioning of the a i? positioned toscan said upper abutrnents when in its upper position when said transfermeans is oscillated, shifter means engaged with s. id member and securedfor predetermined lateral movement with respect to said transfer meansfor moving said member from its lower position to its upper position andvice versa when shifted from one position to its other position,independent stop means on each side of said base for alternatelyengaging opposite ends of said shifter and moving same to each of itstwo positions near the end of each alternate movement of said transfermeans, drive means for oscillating said transfer means whereby theoperation of said drive means and completion of movement of saidtransfer means in one direction will engage one end of said shifter withone of said stop means to move same and position said member and pawlsto scan said lower abutments and whereby the completion of the nextopposite movement of said transfer means will engage said shifter platewith the other of said stop means and return the same to raise respectto a vertical axis, a plurality of equi-spacedlatches movably retainedin a row in said frame concentric with and equi-distant from said axis,each of said latches having an integral abutment positioned forpredetermined movement with respect to the concave side of said framewhen moved to released position, each of said latches including latchingmeans for engagement with said frame for normally holding each saidlatch and its said abutment in said normal rest position, a projectionintegral with each of said latches extending substantially normal to thepath of movement thereof, independent spring means secured to each latchand said frame for normally holding each of said latching means inengagement with said frame and for urging each of said latches and itssaid abutment toward said released position, an arcuate slide memberretained in said frame and adapted for reciprocating movement concentricabout said axis, a plurality of integral inclined cam surfaces in oneside of said slide, each of said cam surfaces corresponding with andpositioned in the path of movement of each of said projections, a secondspring means secured to said slide member and said frame for urging saidmember into a normal rest position, electric switch means forcontrolling an electric circuit when operated, said switch meansoperatively positioned in fixed position with respect to said frame andadapted to be operated by said slide when the latter is moved wherebythe predetermined movement of each of said latches will permit itscorresponding said spring means to release said latch and move itscorresponding abutment to said released position and concurrently engageits said projection widi a corresponding said cam surface and move saidslide against the restraining action of said second spring means tooperate said switch means and whereby the restoration of the last of anumber of released said latches to its retracted position will permitsaid second spring means to return said slide and said switch means totheir normal positions.

4. In a record changer of the character described means forming a base,an arcuate selector secured to'said' base concentrically positioned withrespect to an axis vertical to said base, a plurality of equi-spacedlatches movably retained in said selector in a row concentric with andequi-distant from said axis, each of said latches adapted for movementfrom a restored position to a released position with respect to theconcave side of said selector, a platform member for scanning saidlatches having one end thereof pivotally secured to said base andjournalled for oscillatory movement about said axis, a registrationmember secured to the outer end portion of opposite end of said leverterminating in a quadrant gear,

said platform, a pair of pawls mounted on said registration member nearthe outer end thereof for pivotal movement about axes which are parallelto one another, spring means for biasing said pawls in oppositedirections so that said pawls are adapted to engage each of saidreleased latches to arrest the movement of said platform when oscillatedfrom either direction for registering and holding said platform inpredetermined radial positions, a latch restore member retained by saidregistration member for radial reciprocation between said pawls with itsouter end in longitudinal alignment with any one of said latches inreleased position retained by said pawls, driving means on said platformfor radially reciprocating said restore member through a predeterminedstroke when operated for moving said restore member into engagement withand restoring said one of said latches to its said restored position.

5. In a record changer means forming a base, a record transfer meanshaving a bearing in one end thereof journalled on a support fixed tosaid base for oscillating movement about an axis vertical to said base,the opposite end of said transfer means supported for movement on anannular support fixed to said base concentric to said axis, saidopposite end adapted to scan a fixed selecting means in two directions,said selecting means secured to said base and adapted to engage and holdsaid transfer means in any of a plurality of predetermined selectedpositions when operated, a crank plate journalled for oscillatingmovement on said bearing for intermittently driving said transfer means,spring means secured on said bearing for urging said plate intopredetermined frictional engagement with said transfer means, a platecam having a continuous groove in one surface thereof secured forrotation on said base parallel thereto, a follower lever pivotallysecured at one end to said base and pivotally retained at its oppositeend to said crank plate positioned for movement parallel to said base, afollower means secured to said lever extending into said cam groove andadapted to be moved thereby, said groove formed to move said followerlever and said crank plate a predetermined number of sequentialmovements in opposite directions during a predetermined angle ofrotation of said cam whereby the rotation of said cam through said angleof rotation will oscillate said transfer means into engagement with saidselecting means when operated in any of said predetermined positions andwhereby said plate will overcome its said frictional engagement withsaid transfer means and complete said predetermined number of sequentialmovements.

6. In a record changer, a base, a record transfer means having a bearingin one end thereof journalled on a support fixed to said base foroscillating movement about an axis vertical to said base, the oppositeend of said transfer means supported for movement on an annular supportfixed to said base concentric to said axis, said opposite end adapted toscan a fixed selecting means in two directions, said selecting meanssecured to said base and adapted to engage and hold said transfer meansin any of a plurality of predetermined selected positions when operated,a drive plate journalled for oscillating movement on said heating forintermittently driving said transfer means, spring means secured on saidbearing for urging said plate into predetermined frictional engagementwith said transfer means, a plate cam having a continuous groove in onesurface thereof secured for rotation on said base parallel thereto, afollower lever pivotally secured to said base and having follower meanssecured in one end thereof extending into said cam groove, the

gear means secured to said plate concentric with said axis and inengagement with said quadrant gear, said groove formed to move saidfollower lever, said gears, and said drive plate a predetermined numberof sequential movements in opposite directions during said predeterminedangle of rotation of said cam whereby the rotation V tioned in any ofits said plurality of positions.

39 of said cam through said angle of rotation will oscillate saidtransfer means into engagement with said selecting means when operatedin any of saidpredetermined posi tions and whereby said plate willovercome its said frictional engagement with said transfer means andcomplete said predetermined number of sequential movements.

"7. In a record changer, a base, aturntable journalled for rotationabout an axis vertical to said base on a support fixed thereto, aplurality of records supported on said 7 base in vertical spacedrelation in equi-distant radial rela tion with said axis, a selectiverecord transfer means ineluding a record transport means journalled onsaid support for movement about said axis for selective registra- T saidtransport head is positioned,

tion with each of, said records, said transport means adapted andconstructed to selectively transport each of said records from its saidvertical position to a horizontal position on the turntable concentrictherewith when operated in one direction and adapted to transport saidrecord from said turntable to its original'position when reverseoperated, rack means positioned in said transfer means'for reciprocationradial to said axis for operating said transport means whenreciprocated, a cam means journalled for predetermined rotary movementon said support about said axis, follower means secured to said rackmeans adapted for engagement and reciprocating movement by said cammeans when'the latter is rotated,

a driven gear positioned coaxial with respect to said axis and securedto said cam for rotating same, a main plate cam positioned for rotationon said base parallel thereto and having a groove in one face thereof, afollower lever means pivotally secured to said base having one endterminating in a second follower means, extending into said groove, theother end of said lever means terminating in a quadrant gear engagedwithsaid first mentioned gear,

said groove formed to drive said lever a predetermined reciprocationduring a predetermined angle of rotation of said 'maincam whereby saiddriven gear will drive said cam means and reciprocate said rack meansone predetermined to 'and fro stroke when said transmission means is inany one of its predetermined selected positions to operatesaidltransport means and transfer a on a i and said driven meansrespectively, and lever means operatively connected to said cam meansand pivotally mounted for movement a fixeddistance from said axis andadapted for predetermined oscillatory movement, said a lever meansterminating at one end in' a quadrant gear in engagement with saiddriven gear whereby 'a' forward and reverse movement of said lever meanswill drive said driven gear, said crank arm, said connecting rod and reciprocate said driven means to transport a selected record in restposition to, said play position and viceversa when v in any of its saidplurality of positions. t 7

10. In an automatictselective'record changer, a base, a

turntable secured to said base for rotation about a fixed axis, a recordmagazine secured to said base for retain-' ing therein a plurality ofdisc records in uniformly spaced relationship, a selector secured tosaid base including a plurality of movable abutments retainedin saiduniformly spaced relationship, each of said abutments corresponding toone of said recordsand supported for predetermined displacement, arecordtransfer means secured to said base'and mounted for movement along saidmagazine for scanning said records in said magazine when selected recordfrom its original position to the turntable for playing and vice versa.4 V W 8. In a record changer a record transport head adapted formovement to a predetermined plurality of positions about a verticalaxis, driven means in said head responsive to reciprocating movement fortransporting a selected record from rest to play position when operatedin one,

direction and adapted to return said record from play position to saidrest position when operated in reverse direction,'cam means journallcdfor rotation about said axis operatively related to said driven means,gear means secured to said cam means concentric with said axis fordriving said cam means, a'ndlever means operatively connected to saidcam means and pivota'lly mounted for movement a fixed distance from saidaxis and adapted for predetermined oscillatory movement, saidleverrneans terminating at one end in a quadrant gear in engagement withsaid first mentioned gearmeans :whereby aforward and reverse movement ofsaid lever meanswill drive said gear means, said cam means and saiddriven means to transport aselected ITBCOIdfil'LIfiSiQPOSiiiOH to saidplay position and 'vice versawhen said transport head is posi- 9.:Iirarecord changer are'c'ord transport head adapted for movementf'to' apredetermined plurality of positionsv about a vertical axis, drivenmeans in said head responsive to reciprocating movement'for'transporting'a' selectedfrec-i ord from rest to play position whenoperated in one direc V tion'an d adapted to, return saidrecord fromplay position I tto said rest position when operated in reversedirectiorna moved, drive means for moving said transfer means, and" pawlmeans retained on the outer portion of said trans-,

fer means for arresting and holding said transfr means in register witha record in 'said magazine corresponding with a selected displacedabutment, said pawl means com= I prising a pair of pawls mounted forpivotal movement 'about mutually parallelaxes and spaced apart by,atdistance substantially equal to the thickness of said abut ments, andspring means for biasin angular directions. a

11 In an automatic selective record changer, a base,-'a"

turntable secured to said base for rotation about a'fixed axis', arecord magazine secured to said 'base for retaining therein a pluralityof disc records in uniformly spaced relationship, a selector secured tosaid base including a plurality of movable abutmentstretained in saiduniformly spaced relationship, each ofsaid abutments corresponding toone of said records and supported for predetermined displacement, arecord transfer means secured to'said base and mounted for movementalong saidmagazine for scanning said records in said magazine whenmoved, drive driven gear journalled for rotation about'said axis and'having a crank arm extending therefrom, connecting rod means pivotallysecured at. both "ends to said 'crankarml 173 means for moving saidtransfer :means, a pair of pawls' pivotally mounted on parallel axes onsaid transfer means for engaging displaced ones of said abutments,spring means for-biasing said pawls in angularly opposite di: rectionswhereby said abutments may be engaged and held by said pair of pawlsto'interrupt movement'of said transfer means irrespective of thedirection of movement thereof with respect to said abutment, an abutmentrestore member mounted on said transfer. means for'radial re,- 7

ciprocation between said'pa'wls, and driving means for radiallyreciprocating said restore member for moving said I restore member intoengagement with the held one of the said abutments forretuming ittoits'non-displaced posi- V (Gther references on followin g page);

g said pawls in opposite

